- 最近发现 AppStore 更新 iTunes 12.5.1.21 的时候， AppStore 更新的时候，下载完了就会停止，无法更新。
- 最后搜索发现有人说是 s.mzstatic.com 解析的貌似有问题，目前国内的 114 、阿里、 DNSPod 等等一概不好使，换用 8.8.8.8 之后正常，但是 AppStore 下载 iTunes 的速度明显变慢，不过在下载完成后是可以顺利安装的。
- 尚不清楚是否是单纯 s.mzstatic.com 的解析不正确导致的无法通过 AppStore 更新 iTunes 。同样也不知道是苹果的郭还是有关部门的锅。。。
- 8.8.8.8 解析 s.mzstatic.com 的结果如下：
> server 8.8.8.8
Default server: 8.8.8.8
Address: 8.8.8.8#53
> s.mzstatic.com
Server: 8.8.8.8
Address: 8.8.8.8#53
Non-authoritative answer:
s.mzstatic.com canonical name = s.mzstatic.itunes-apple.com.akadns.net.
s.mzstatic.itunes-apple.com.akadns.net canonical name = s-mzstatic-applak.itunes-apple.com.akadns.net.
s-mzstatic-applak.itunes-apple.com.akadns.net canonical name = mzstatic.com.edgekey.net.
mzstatic.com.edgekey.net canonical name = e905.e9.akamaiedge.net.
Name: e905.e9.akamaiedge.net
Address: 23.66.95.170
> server 114.114.114.114
Default server: 114.114.114.114
Address: 114.114.114.114#53
> s.mzstatic.com
Server: 114.114.114.114
Address: 114.114.114.114#53
Non-authoritative answer:
s.mzstatic.com canonical name = s.mzstatic.itunes-apple.com.akadns.net.
s.mzstatic.itunes-apple.com.akadns.net canonical name = s-china.mzstatic.itunes-apple.com.akadns.net.
s-china.mzstatic.itunes-apple.com.akadns.net canonical name = s.mzstatic.com.mwcname.com.
s.mzstatic.com.mwcname.com canonical name = applehttpsdtsni.dtwscache.ourwebcdn.com.
Name: applehttpsdtsni.dtwscache.ourwebcdn.com
Address: 150.138.167.168
Name: applehttpsdtsni.dtwscache.ourwebcdn.com
Address: 150.138.170.22
> server 223.5.5.5
Default server: 223.5.5.5
Address: 223.5.5.5#53
> s.mzstatic.com
Server: 223.5.5.5
Address: 223.5.5.5#53
Non-authoritative answer:
s.mzstatic.com canonical name = s.mzstatic.itunes-apple.com.akadns.net.
s.mzstatic.itunes-apple.com.akadns.net canonical name = s-china.mzstatic.itunes-apple.com.akadns.net.
s-china.mzstatic.itunes-apple.com.akadns.net canonical name = s.mzstatic.com.mwcname.com.
s.mzstatic.com.mwcname.com canonical name = applehttpsdtsni.dtwscache.ourwebcdn.com.
Name: applehttpsdtsni.dtwscache.ourwebcdn.com
Address: 218.92.221.212
Name: applehttpsdtsni.dtwscache.ourwebcdn.com
Address: 222.187.242.171
> server 119.29.29.29
Default server: 119.29.29.29
Address: 119.29.29.29#53
> s.mzstatic.com
Server: 119.29.29.29
Address: 119.29.29.29#53
Non-authoritative answer:
s.mzstatic.com canonical name = s.mzstatic.itunes-apple.com.akadns.net.
s.mzstatic.itunes-apple.com.akadns.net canonical name = s-china.mzstatic.itunes-apple.com.akadns.net.
s-china.mzstatic.itunes-apple.com.akadns.net canonical name = s.mzstatic.com.mwcname.com.
s.mzstatic.com.mwcname.com canonical name = applehttpsdtsni.dtwscache.ourwebcdn.com.
Name: applehttpsdtsni.dtwscache.ourwebcdn.com
Address: 150.138.167.168
Name: applehttpsdtsni.dtwscache.ourwebcdn.com
Address: 150.138.170.22
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